For sugar syrup, bring water and sugar to boil in saucepan, stirring occasionally, until sugar dissolves. Pour into bowl. Cool.

Microwave 5 or 6 lemons at a time on High 1 to 1-1/2 minutes, just until warm to touch. Cut lemons in half and squeeze juice. Discard seeds. Transfer juice and pulp to large pitcher. Repeat with remaining lemons. Stir in cooled syrup and water.